Machine fob boring ob mortising blind-stiles



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vState of New Hampshire, have invented an UNITED STATES PATENT OFFICE.

LEONARD WORCESTER, OF LEBANON, NEW HAMPSHIRE.

MACHINE FOR BORING OR MORTISING BLIND-STILES.

Specification of Letters Patent No. 24,688, dated July 5, 1859.

To all whom it may concern:

Be it known that I, LEONARD WORCESTER, of Lebanon, in the county of Grafton and Improved Automatically-Operating Machine for Forming the Necessary Mortises or Pivot-Holes in the Stiles of lVindowdlinds; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, making a part of this specification, Figure 1 being a top view of said machine; Fig. 2, a side elevation of the same; Fig. 3, a section in the line y y of Fig. 1, and the remaining figures represent detached portions of the machine.

Similar letters indicate like parts in each of the drawings.

The frame of my improved mortising and boring machine may be constructed of metal, in the manner represented in the accompanying drawings, or it may be constructed of any other material and in any suitable manner. The respective movements of said machine, are of such a character, and are so arranged with respect to each other, that two stiles (g, g,) can be simultaneously operated upon.

The position of a pair of stiles when placed in the machine to be operated upon, is represented in Figs. l, 2, and 3. Each stile is secured to a notched feeding plate N, by means of a curved strap u, and a set-screw ,-or by any other suitable means; and each feeding plate N, rests upon a transversely movable carriage A. The carriages A, A, are supported and guided in their movements by the transverse plates B, B, which are secured to the upper side pieces of the frame of the machine. The lug g, which rises from the inner end of each carriage A, and the opposite ledge c, which rises from the upper face of said carriage, forms a guiding way for the notched feeding-plate N, which rests upon the same. When a stile is placed in its position upon a carriage A, lts outer surface is acted upon by a spring z', at the inner end of the slotted plate 7i; which plate can be secured in any desired position upon the carriage by means of the set screw '0. The sha ft Gr, which has sockets in each of its ends for the reception of the requisite mortising or boring bits eZ, or s, works in journal boxes that are secured to the upper end of the rej ciprocating carriage C, which is supported and guided its movements by the inclined i ways M, M, that are securedto the frame of the machine in the manner represented in Fig. 3, or which may be supported in any other suitable manner.

Fig. 6, is a representation of a full sized bit, such as I generally use for boring pivotholes in blind-Stiles, and Fig. ll, is a representation of the bit which I use for forming mortises in the stiles of blinds by adding a laterally reciprocating movement to the usual rotating movements of said bit.

The blind-Stiles g, g, are held firmly in their positions during the operation of boring or mortising them, and are then relieved from their fastenings, and are moved outward and forward to the next position for operating upon the same, in the following manner, viz :-An upright 1, which is cast in one piece with, or is otherwise secured to one of the inner angles of each carria e A, rises above and descends below the sai carriage, as represented in Fig. 9. To the upper portion of the upright r, of each carriage A, a curved lever f, is jointed, as represented in the drawings. The short end of each lever f, curves outward a sulicient distance to bring the vertical aperture therein, which receives the adjustable holder fw, over the center of the stile g, on that side of the machine. The long ends ofthe levers f, f', curve downward and bear upon the cams fm, m, which radiate from the outer ends of the cylinders L, on the shaft K, with sufficient force to cause the faces of the holders fw, fw, in the opposite ends 0f said levers, to bear so firmly on the upper surfaces of the stiles as to securely hold them in their positions upon the carriages A, A, while they are being operated upon by the mort-ising or boring bits in the shaft G.

The two levers, E, E, which are pivoted to the transverse piece F, of the frame of the machine, serve to connect the descending project-ions r, r, of the carriages A, A, with actuating cam-grooves n fr, n w, in the aforesaid cylinders L, L, in the manner represented in the dra-wings, viZz-The downward projection r, from each carriage A, is received into a concavity in the left-hand end of its lever E, and a descending tooth from the opposite end of said lever, fits into its actuating cam-groove n a?, in one of the aforesaid cylinders L. IVhen the descending teeth of the levers E, E, are at the points ai, of the cam-grooves in the cylinders L, L, the carriages A, A, will be at their extreme outermost positions, and the and the outer ends of said pawls are constiles g, g, will be entirely beyond the reach of the bits in the ends of the shaft G. J ust before the said lever teeth reach the aforesaid positions in the cam-grooves n m, the curved ends of the levers j, f, descend into the notches 05, Z2, in the cams m, my, and thereby entirely relieve the stiles of the pressure of the holders w, w, at the opposite ends ofthe said levers. -The requisite forward feeding movements are imparted to the stiles g, g, in the following Vmanner, viz Spring pawls 7:, 7e, which are combined with the sliding carriage J, work freely into the notches in the feeding plates N, N, a short leg o, and a long leg p, which descend from the under surface of thecarriage J, are successively acted upon by the horizontal pin CZ, (which is secured to the inner ends of the cylinders L, L,) in such a manner as to produce the required movements of the said carriage; the forward movement of the carriage being imparted thereto the moment after the action of the cams and cam-grooves of the cylinders L L, upon the levers E, E, and f, f, have moved the said stiles outward and relieved them from the pressure of their holders. The instantafter a feeding movement has been imparted to the stiles g, g, the curved ends of the levers j', f, pass out of the notches in the cams mi, m, and bear upon the peripheries of the same, which movement brings the holders fw, w, at the opposite ends of said levers, down upon the stiles with any desired degree of force. The cam-grooves n fr, in the cylinders L, L, are of such an oblique shape that the rotation of said cyl` indersV will gradually force the tooth-ends of the levers E, E, asunder and thereby cause the opposite ends of said levers to draw the carriages A, A, and the stiles g, Q,

Y inward during the time that the teeth of the levers are passing from the points w, to the points n, in said grooves; and then the abrupt inclination in the grooves will suddenly draw the outer ends of said grooves inward for the purpose of causing .the opposite ends of the same to suddenly force outward the stilesg, g, beyond the reach of the bits in the ends of the shaft G.

A reciprocating movement is imparted to l the'carriage C, which carries shaft Gr, by

means of the adjustable crank a, on the shaft D, and the pitman b, which connects the former with the-latter as shown in the drawings. l/Vhen it is desired to form pivot holes in the stiles, the shaft G, may be secured in a permanent position by screwing the screw e, in the cross-piece f, up into a notch or aperture in the pitman Z9; or the said shaft may be secured in the desired posit-ion by any other suitable means.

The pivots of the pawls 7c, 7a, are located near the centers of the lengths of the same,

nected to each other by means of an elastic cord j; or the said pawls mayl be operated by springs of any suitable character. The actuating ends of the pawls la, la, can be simultaneouslyrdrawn inward and secured in such a position that they will not act upon the teeth of the feeding-plates N, N, by means of the pivoted hand-piece I, in the manner represented in liglO.V l

A small pulley on'one end of the driving shaft I-I, is banded to a large pulley on the crank-shaft D, and a large Ycentral pulley on the said driving shaft, isY banded to a small pulley on the center of the bit-carry-. ing shaft Gr.V Motion is imparted tothe cylinders L, L, by means of a band which connects a small pulley on the crank-shaft D, with a large pulley on the shaft K. I do not, however, intend to restrict myself to any particular method of imparting motion to the different shafts, or arbors, of my improved mortising and boring machine, nor to any precise shape orarrangement of the respective parts of said machine, provided the respective parts thereof are so constructed and arranged that two stiles can be operated upon at the same time, substantially as herein set forth.

What I claim as my invention, and desire to secure by Letters Patent, is, 1

1. Combining the transversely reciprocating carriages A, A, with the cam-cylinders L, L, by means of the pairs of vibrating levers E, E, and f, f, substantially in the manner and for the purposes herein set forth.

2. I also claim as my invention, the notched plates N, N, for sustaining the stiles during the operation of mortising or boring the same when the said plates are combined with reciprocating bearings and othersuitable mechanism in such a manner that the necessary laterally reciprocating and longitudinally feeding movements will be imparted to said plates substantially as hereinY set forth.

3. I also claim combining the bearings of the bit-shaft G, with the reciprocating carriage C, when the said shaft is so arranged wit-h relation to the notched plates N, N, that the bits which project from the ends of said shaft will act upon the stiles as they are automatically presented to them substantially as herein set forth.

4. I also claim the combination and joint operation with each other of the reciprocating carriages A, A, the knotched plates N, N, the pairs of levers E, E, and f, j, the camcylinders L, L, the reciprocating springpawls 7c, 7c, and the bit-carrying cylinder Gr, substantially as herein setrfort LEONARD WORCESTER.

Vitnesses: Y

AARON H. CRAPIN, A. M. MORSE. 

